Turn things in common into separate libs.

Took 2 hours 27 minutes

libs/pb/serverinfo_chat_message.proto

@@ -0,0 +1,16 @@
+syntax = "proto2";
+/*
+ * Chat communication of a user to a target.
+ * Targets can be users or rooms.
+ * These communications are also stored in the DB log table.
+ */
+message ServerInfo_ChatMessage {
+    optional string time = 1;        // time chat was sent
+    optional string sender_id = 2;   // id of sender
+    optional string sender_name = 3; // name of sender
+    optional string sender_ip = 4;   // ip of sender
+    optional string message = 5;     // message
+    optional string target_type = 6; // target type (room,game,chat)
+    optional string target_id = 7;   // id of target
+    optional string target_name = 8; // name of target
+}